An Experimental Study of Surface Buoy Profiles to Improve the Accuracy of Seafloor Crustal Deformation and Tsunami Signal Observations of the On-Demand Buoy System

摘要

A hydraulic experiment was carried out to determine the optimal profile of surface buoys of the on-demand buoy system for observing seafloor crustal deformation and tsunami signals. The experiment used a rectangular flume with surface buoy models, and the surface buoy profile was changed by analogy with the profile of a tree crown that has been deformed by a stream. Then, the fluid force acting on the surface buoy was measured with a force transducer, and its drag coefficient was evaluated. The results showed that, for observation accuracy, a buoyancy unit with a 2D droplet profile and a lower structure with a 3D droplet profile were optimal.